1.1 This specification establishes requirements for copper-beryllium alloy sand castings for general applications and nominal compositions alloys defined by this specification are shown in Table 1.

1.2 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 The following safety hazard caveat pertains only to the test methods described in this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.

TABLE 1 Nominal Compositions

Copper Alloy UNS No.

Previous Designation

Copper

Nickel

Silicon

Beryllium

Cobalt

Chromium

Iron

Zirconium

Tin

Manganese

C81400

70C

99.1

...

...

0.06

...

0.8

...

...

...

...

C82000

10C

97

...

...

0.5

2.5

...

...

...

...

...

C82200

3C, 14C

98

2.0

...

0.5

...

...

...

...

...

...

C82400A

165C, 165CTA

97.8

...

...

1.7

0.5

...

...

...

...

...

C82500A

20C, 20CTA

97.2

...

0.3

2.0

0.5

...

...

...

...

...

C82510

21C

96.6

...

0.3

2.0

1.1

...

...

...

...

...

C82600A

245C, 245CTA

96.8

...

0.3

2.4

0.5

...

...

...

...

...

C82800A

275C, 275CTA

96.6

...

0.3

2.6

0.5

...

...

...

...

...

C96700

72C

67.2

31.0

...

1.2

...

...

0.6

0.3

0.3

0.6

A When fine-grained castings are specified, 0.02 to 0.12 titanium is added for grain refinement, usually in the remelt ingot. See Specification B30.